Metal-extrusion press



F. e. SCHRANZ.

METALEXTRUSION PRESS,

APPLICATION min AUG.4, 1920.

1,393,579. Patent-ed 001. 11, 1921.

6 SHEETS-SHEET I.

F. G. SCHRANZ.

METAL EXITHUSION PRESS. APPLICATION man AUG-4. 1920-.

"Patented Oct. 11, 1921.

- s SHEETSQSHEET 2.

N a m I F. G. SCHRANZ.

METAL EXTRUSION PRESS.

APPLICATION HLED Aus.4, 1920.

1,393,579. Patented 0m. '11; 1921.

6 SHEETSSHEET 3.

.GzSc/Eramz:

F. G. SCHRANZ.

METAL EXT RUS!0N P RESS. APPLICATION FILED AUG.4 1920,

1,393,579, Patented 0613. 11, 1921;

6 SHEETS-"SHEE 4.

F. G. SCHRANZ.

METAL EXTRUSION PRESS. APPHCATION man Aum, 1920.

1,393,579. Pam-ma m. m, 1921.

6 SHEETS-SHEET 5,

F. e. SCHRANZ.

MET AL .EXTRUSION PRESS.

' APPLICATION FILED AUG.4, 1920.

Patented Oct. 11, 1921.

V\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\aw- A Ill? srsrss FREDERICK SAC-ERA.

. E EHIMDELEHIA, ZEBTEFSYLVANIA.

Specification of Letters Eetent. lflatten'tefi Get. 11, 19 21..

.llpgzl'lcction med ls-ingest Serial No. 10L115.

To all whom it may concern:

Be it known that l, Fenonnioir *(ilnoson SoHnANz, a citizen or" the United States, and a. resident of Philadelphia, .l ennsylvania, have invented certain new and useful Improvements in lilctelldlxtrnsion Presses of which thefollowing is e specification.

My invention relates to apparatus for trading rod-s, tubes, and the like, from solid metal, usually heated billets of non-ferrous metal, and one object of my invention is to provide simple and ellicient means for readily moving the extrusion plunger in both irections; into and away "from engagement with the billet from which the rod or tube is extruded.

A. furtherobject of my invention is to provide a movable housing or cross-heed for carrying the bested billet, whereby means are provided for moving the letter when desired; should e os too soon, or should anything prevent its proper reduction; such inecns also permitting the removal of a billetreceiving sleeve carried by such housor cross-heed should such sleeve freeze to the billet or become-worn; thereby persitting the replacement of it, fresh sleeve without dismantling the entire machine.

A further object of my invention is to provide means, which may be carried by the main cylinder, for effecting mox-ement oi the billet-receiving housing or cross-head independently of the movement of the main piston carrying the extrusion plot-gel.

A further object of my invention is to provide improved means for retracting the main piston carrying the extrusion. plunger.

A further object of my invention is to provide an improved form of die carrier which is movsble'into position with respect to the billet-receiving sleeve, and may be moved away from such position to permit entrance of the billet.

A further object of my invention is to provide means for moving the cross-head connected to the main piston independently of the lstter,'sh.ould it be necessary for repairs or desirable for other reasons.

. A further object of my invention is to provide simple and efiicient means for setting up and maintaining the several parts .ofthe structure in proper zilnienicnt and a still further object of my invention is to arrange the several parts of the structure easy of access in order that any necessary re gairs or partial ,dismentlingcan be e iected easily and expeditiously end without taking down the whole machine.

These and other feetures of my invention ere more fully described hereinafter; reier ence being lied to the accompanying drew-v logs, in which:

Figure l, is 21 side elevation of one form of metei extrusion press having and containing the features forming the subject 'ol' myprcsent invention.

Fig. 2 is a longitudinal on the line E il,

Fig. 3, is plan view of my improved exsectional View,

trusion press. Fig. L, is s sectional plan view, on the line lV--IV, Fig. 1, and

Figs. 5, 6

tube may be extruded.

The movable housing or cross-head 6 is normally held in the position illustrated in Figs. 1, 2 and 3, adjacent to the housing 1*, and is maintained in such position by fluid under pressure within so-celled push cylinders 9, disposedet the sides of the main cylinder 3; such pressure actingupon the rear ends of pistons 10 disposed insaid push cylinders; which pistons are connected with side arms or extensions 11. of the cross head or housing 6. This pressure, entering these cylinders via the pipes 9, is constant while the machine in operation so that the parts are normally maintained in the position referred to. When it is desired. to. move the crossheeol or housing 6 towond the cylinder 3, the pipes 9 may be opened to exhaust and pressure maythen enter the pipes 9 to retract the pistons 10.

LISQOSG/d within the cross-head or housing 6, end in' axial elinenient with the cylinfs deed, is the sleeve 7 adapted to receive the billet 8', from which 9. rod or tube, indi f csted at 8, is extruded through a suitable die 12, which may be mounted in e diellfl) block 13, disposed in a support 14; cerriedby the fixed housing 1 en wheelie agre s s in operation, is held against displacement by a slidable thrust-block 15.

The main cylinder 3 contains the piston 4, suitably connected to the. cross-head 5; the latter carrying a plunger 16, in axial alinement with the sleeve 7 carried by the cross-head or housing 6, which plunger is designed to act upon the billet disposed in said sleeve when the piston 4% moves on its working stroke; a wearblock 17 being prcferably interposed between said plunger 16 and the billet.

Pressure to move the piston 4 outwardly or on its working stroke, enters via a pipe 18 at the rear of the cylinder 3, and by means of suitable connections (not shown), this same pressure communicates with so-called pull-back cylinders 19, disposed above and below the cylinder 3, and containing pistons or plungers 20, having rods 21, connected to arms 22, of the cross-head 5; such pressure being constant in said cylinders 19. As soon as the line leading to the inlet 18, of the cylinder -3.is open to exhaust, the constant pressure on the pistons 20, within the pull back cylinders 19, which pressure may enter via the pipe 19 retracts the crosshead 5, carrying the plunger 16 out of the sleeve 7; leaving the latter tree to receive a fresh billet.

The area of the piston 4 being so much greater than the area of the pistons or plungers 20 exposed to the same pressure, there is no retardation on the forward or working stroke of the main iston. As soon as the pessure on the main piston is relieved, however, the pistons or plungers 20 act to retract the main piston and its contractedv parts.

After a billet has been reduced to the extent. shown in Fig. 2 the thrust-block 15 is withdrawn, and for this purpose Imay provide fluid pressure means; a cylincer 25 containing a piston to which is attached a rod 26, connected at 27 to said the -Sll--l)l0(3l; being disposed at the side of the machine and being movable at rightangles to the longitudinal axis thereof The die and die block may be removed afterthe thrust-block has been withdrawn, and the extruded rod or tube, with the stub of metal in the die 12, is earned away from the machine by suitable means; asuitable trough being pro-' vided to receive such rod or tube.

Immediately after the die has been removed from the housing .1, a fresh billet is inserted in the sleeve 7, prcteral'ily by the means employed to remove the extruded rod or tube and the stub end of the previous billet, but operatin in the opposite direction; the die and die-block are theninserted in proper position in the cross-head'ior housing' 6, and the thrust-block 15 is moved into pps tion to support. the die and die-block. ea-nwhlle, the main cylinder 8 having been *the pistons within the pull-back cylinders 19, has caused them to carry back the crosshead 5 and the plunger 16 attached thereto, with the main piston 4:, and the machine is then ready for operationon the next billet, and so on.

In a o g-pending application filed August 4,, 1920, Serial Number 401,116, I have described and claimed means for carryin away from the press the extruded rods and tubes, and cutting the stub ends of the billets therefrom; the conveyor serving to introduce fresh billets to the sleeve 7, when retracted to bring the die, die-block and support to position.

In order to maintain the parts so that the cross-heads band 6 may be kept in proper alinement and moved on the rods 2 with precision, I provide adjustable wedge-blocks 30, carried by the cross-head 5, and similar adjustable wedgeblocks 31, carried by the movable cross-head or lio usingofirThese"' wedge-blocks 30 andill, may be set up by screws 32 and 33, respectively, and held in their adjusted positions by loclonuts 34 and 35, respectively.

. In case a billet should freeze, in the billetreceiving' sleeve 7, or whenever the latter becomes worn, such sleeve, with or without the billet, may be removed by imparting movement to the cross-head or housing 6, toward the cylinder 3. In such instance, pressure is directed through the pipes 9" to the front ends of the pistons 10' in the socalled f pusli cylinders 9, and by interposing a suitable block between the end of the plunger 16 and said sleeve 7, the latter may be displaced, as indicated in Fig. i.

The cross-head or housing 6 may be provided with the usual means, in the form of a suitable stove 37, depending therefrom and movable therewith, for maintaining the heat of the billet container during the process of extruding the billet through the die 12, such stove having the usual fuel inlet whichmay be closed by a door 38. i

lt will be understood, of course, that my improved extrusion press is provided with the usual piping to convey fluid under prcs- 115 sure, with the necessary valves, manual controlling means, and other accessories, necessary for the purpose of operating the several pistons or plungers; all of which is common in the art to which my invention-relates.

I claim:

1. The combination, in a metal extruding press, of a cylinder, :1 piston therein, a cross head carried by said piston, auxiliary pistons connected to said cross-head, cylinders 125 for the same, means for directing pressure to the several cylinders; the pressure in said auxiliary cylinders being constant, and means for exhausting pressure from the main cylinder whereby the constant" pres- 130 The prggs, m'f a cmsa-mad iamasing suppoms far th-za a, said ems. head b L1". Th1 combina a press, af :1 cmss fixed, :1 cyiindsr head carried by flzai'ewifih Emrizsaibi cmswhemh aween sash of pom". v 18. Th@ mmibinatimm, pness @f a pair 01 and hsursz-i a pair (sf crosslms. is mowfhly twean said suppm'ias, 1 leans 1 hr mavimg eithez' of cmss- -eads wifiz mspsch m other, a plunger carried. bv .m said cmswhemis, and a removabie'blfieiz-r skew: carried by the other cross-head; smii phmger and sleeve caiiperszsing a billet mm the slegve or to mxip ha sieeve Evan:

H in E 7 movzsbie its m'osshead,

v auxilizw v pistons,

19. Thfi mmbinatkm, a ing press, @ff :1 cyiindar 21 3 mess-head carrifii by s If" auxiliary pix-bans cylinders fm'sai l PM 0! W a. cal a crosshmd the agiposite arm. of file mesa a pail Q1? -".iz: .dews (Emmi? a horimnmi 121mm and pist 11 latter Q 7S and "v may be msveci with TEE-q cyiimier.

The combin press, oi a cyiini head amnesia} ts tans connec teif in paws sure in me sex sm? c um i said auxiliary c3 1 adds and means far OFEBFHIKQ; a mam 3h;

hausi; Whm'eb'y the :4 v auxiliary cyhndezs may aciuM-e therein to "vet 11m; the crosshezld am a main 'pis mn.

:wcupying zed position duiing the maven:

Jan, in 2 m @xtruiing indar, a m m able musing ("Ry a fixed f 1 cyiincier, and spam 3y connecmzi crass-hem may be T6- 0 {he m cylinder. p Jami emz'mding "awn fijhaemin, a, cmss 1 hm, a plungm cm:- 11 means fer reclpro 11216 pinngw, a mass 155" at $5163 appmiice and af the press, remumble biHet-mseiving sleeve dispusad in m1: msrmentionfid csxws'haad in Mia Minemram with the plunger.

24. The eombimtion, in a met-a1 er-ztruding 711353, (A? a fixed eylindar, a movable crass- 163d 01 musing; ncrmaiiy eccupying & fixed m ifiion wiih respeca ta said cylindfirand manta? in ayziial Minemem tfiere- Emmi @yiindars carriad by ,pisons fizhayein wnnected es's-hszad 01.- housing; means 1r" a to said auxihary cyl- JJ'y $315 crass-ham may be Ice and gm 9s far mainizailzzing she aiinemai 0 s 1 crass-ham during rcipmca- M I I amnbimiciun, 3 mm tzz'uding a, main ,g lim'l sr therein, 22. v in mid pi tam mm;

" Z aflinamem. thiams cmriai said herein e ammc'ei $0 v dimming pz'assure m we; c said cmsfi-haa be we to $3143 mam 0W1 mdez-g mm 1:". mad 3; @115 waving said croshead m1 12s workin: mmntammg unss hfiaddur "1g its movemens.

msa'tmn in a mam exiruding uynmiar, 'pmixm ikharem,

n'fifizd to said piston, a, movabie cwss-h'md 0r hausizig at file oppo- 2 ,311]. 0f the press); said erusheads having ins-1r cent ars in. axial Minemen with said pistnn, a, pim'aiity of auxiliary cylindiel's car.- ried by said mam eylinder, pistfins therein connscvted wifil said cross-heads, means for directing pressure is said auxiliary cylinders whez'fiuy 11011 9; said c'ifisshea may be moved Wm IESPQCt 5:0 the aylindexx and indepemian bets 01' guidQs for maximuming the axial aiinement bf said wossheafis during mnmavemenis.

27. The

T shave; aa rziagl m id rename c'ross-heacLa die-block mountedl in said support, and a slidable thrust-block operable in said support into and out of engagement the other.

29. The combination, in a metal extruding press, of a, main cylinder, a piston therein, a cross-head connected to said piston, a pair of auxiliary pistons connected to said crosshead, cylinders tor said auxiliary pistons carried by the main cylinder, a cross-head at the opposite end of the press, a second pair of cylinders carried by the main cylin" (ler, pistons adapted to said latter cylinders and connected to said last-mentioned crosshead whereby the latter may be moved with respect to the main cylinder, means for directing fluid under ressure to actuate said pistons, and means or axially guiding sard crossheads while the same, are being moved.

In witness whereof I have signed this specification FREDERICK GEGKSE SCHRANL 

